Display screen or portion thereof with transitional graphical user interface



FIG. 1 is a front view of a first image in a sequence of the displayscreen or portion thereof with transitional graphical user interface(“UI”);

FIG. 2 is a detail view taken over the portion 2 of FIG. 3;

FIG. 3 is a front view of a second image in the sequence;

FIG. 4 is a front view of a third image in the sequence, wherein heavydash-dash lines comprise a portion of the design;

FIG. 5 is a front view of a fourth image in the sequence; and,

FIG. 6 is a front view of a fifth image in the sequence.

The subject matter in this patent includes a process or period duringwhich an image sequentially transitions between the images shown inFIGS. 1, 3, 4,5 and 6. This process or period forms no part of theclaimed design.

The broken lines rendered in thin lines including the showing of aportion of the display screen of a communications terminal surroundingthe illustrated design and all text and portions of the graphical userinterface are included for the purpose of illustrating the environmentand form no part of the claimed design.

CLAIM The ornamental design for a display screen or portion thereof withtransitional graphical user interface, as shown and described.